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Nonsinusoidal current-phase relations in semiconductor-superconductor- ferromagnetic insulator devices

Maiani, Andrea ; Flensberg, Karsten ; Leijnse, Martin LU ; Schrade, Constantin ; Vaitiekėnas, Saulius and Seoane Souto, Rubén LU orcid (2023) In Physical Review B 107(24).
Abstract

Coherent tunneling processes of multiple Cooper pairs across a Josephson junction give rise to high harmonics in the current phase relation. In this work, we propose and study Josephson junctions based on semiconductor-superconductor-ferromagnetic insulator heterostructures to engineer nonsinusoidal current-phase relations. The gate-tunability of the charge carriers' density in the semiconductor, together with the adjustable magnetization of the ferromagnetic insulator, provides control over the content of the supercurrent harmonics. At finite exchange field, hybrid junctions can undergo a 0 - π phase transition, resulting in a supercurrent reversal. Close to the transition, single-pair tunneling is suppressed and the current-phase... (More)

Coherent tunneling processes of multiple Cooper pairs across a Josephson junction give rise to high harmonics in the current phase relation. In this work, we propose and study Josephson junctions based on semiconductor-superconductor-ferromagnetic insulator heterostructures to engineer nonsinusoidal current-phase relations. The gate-tunability of the charge carriers' density in the semiconductor, together with the adjustable magnetization of the ferromagnetic insulator, provides control over the content of the supercurrent harmonics. At finite exchange field, hybrid junctions can undergo a 0 - π phase transition, resulting in a supercurrent reversal. Close to the transition, single-pair tunneling is suppressed and the current-phase relation is dominated by the second-harmonic, indicating transport primarily by pairs of Cooper pairs. Finally, we demonstrate that noncollinear magnetization or spin-orbit coupling in the leads and the junction can lead to a gate-tunable Josephson diode effect with efficiencies of up to ∼30%.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
107
issue
24
article number
245415
publisher
American Physical Society
external identifiers
  • scopus:85163464461
ISSN
2469-9950
DOI
10.1103/PhysRevB.107.245415
language
English
LU publication?
yes
id
b76104ed-47c4-4fed-b680-6dda1cdfc4f0
date added to LUP
2023-09-15 11:49:05
date last changed
2023-11-08 11:33:02
@article{b76104ed-47c4-4fed-b680-6dda1cdfc4f0,
  abstract     = {{<p>Coherent tunneling processes of multiple Cooper pairs across a Josephson junction give rise to high harmonics in the current phase relation. In this work, we propose and study Josephson junctions based on semiconductor-superconductor-ferromagnetic insulator heterostructures to engineer nonsinusoidal current-phase relations. The gate-tunability of the charge carriers' density in the semiconductor, together with the adjustable magnetization of the ferromagnetic insulator, provides control over the content of the supercurrent harmonics. At finite exchange field, hybrid junctions can undergo a 0 - π phase transition, resulting in a supercurrent reversal. Close to the transition, single-pair tunneling is suppressed and the current-phase relation is dominated by the second-harmonic, indicating transport primarily by pairs of Cooper pairs. Finally, we demonstrate that noncollinear magnetization or spin-orbit coupling in the leads and the junction can lead to a gate-tunable Josephson diode effect with efficiencies of up to ∼30%.</p>}},
  author       = {{Maiani, Andrea and Flensberg, Karsten and Leijnse, Martin and Schrade, Constantin and Vaitiekėnas, Saulius and Seoane Souto, Rubén}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  number       = {{24}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Nonsinusoidal current-phase relations in semiconductor-superconductor- ferromagnetic insulator devices}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.107.245415}},
  doi          = {{10.1103/PhysRevB.107.245415}},
  volume       = {{107}},
  year         = {{2023}},
}